Ablock slides on a frictionless, horizontal surface with a speed of 1.32 m/s. the block encounters an unstretched spring and compresses it. if it takes the block 0.4 s to come to rest, what would be hte period of oscillation if the block stays stuck to the spring

=force × distance a. work b. velocity c. pressure d. momentum

The softest and hardest minerals are: softest hardest

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?